Annular metallic packing.



J..HORT0N & T. W. KEEN.

ANNULAR METALLIC PACKING.

APPLICATION FILED 11111.4, 1911.

Patented Feb. 6, 1912.

2 SHEETS-SHEET l.

WITNEVSSES INVENTOFIS w'e m.

J. HORTON & T. W. KEEN.

.ANNULAR METALLIC PACKING.

APPLIGATION FILED JANA, 1911.

Patented Feb. 6, 1912.

2 SHEETS-SHEET 2.

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' WITNESSES [21,. 41W aha/M4.

v iwv vnl i W i in .nl ill. N no Elf-LIKES ft-IOHIUILI, OF MUNHALL, ANDTHOMAS W. KEEN, F SVIISSVAL'E, PENNSYLVANIA.

ANNULAB METALLIC? PACKING.

v Specification of Letters Patent.

Patented Feh. ti, 1912.

Application filed January 4. 1911. Serial No. 800,701.

had to the accompai'iying drawings, part of this specification, in

a. side elevation, partly in sectly broken away, showing one lVQlltlOIlas applied to a piston;

low of the some partly s 3 and lere detail views is a sectional. sideelevar invention 41S applied to the i 12 pi a pla n view or the packingring orrangement; Fig. 7 is an edge view of Fig.

: n u w h; and Figs. 8 and 9 are detail views of parts of the metallicpacking.

@ur inv ntion relates to the packing of oircui'er annular ports inreciprocating innings. 510., wherein one circular p. re iprocotes postanother. It. is ofespe ciui use in cv eve where :i comparativelyl'llLf'l) measure is developed such nsin gas or other KU OSIVB engines,whether or double-a ti ln in c of pistons in explosive engines,

it tonne that the high pressure developee, fcspecitdly at, or near thebeginning of the ignition stroke, .vlll enter in the rear of theordinary springqi acliinp' rii'ig's and force them out with suchpressure that the wear causes shoulders to form in the cylinder at theor ls of the stroke. T iis excessive wear 9 and shouldering grives'suehcylinders n coni- }'):.irutivelv short; life and cause trequent rebor'.The same effect also seen on the rods of engines, this being portly t einterior of the cylinder. in

(luv 0. on is desgned to lessen. or n rcl'nr this diilienlty and lhl'jOsists 1n tiling a. fluid-pressed clamping devi which will hold thepacking ring or rules sive outward pressure; as Well .c'vent thispressure from enter- ;ieh rings.

wings. referring to-the form of Figs. 1. to 4:.in'eluslve, in which Weshow. a preferred ziorm of the invention asepconnty Pennsylvnnia, haveinvented it full, clear, and exact description reference ton rod in thec 'linder head caused hy the paelrings in the head which.

he of the ordinary. elastic spring type; and

before these are inserted we snap into this annullnvrecess the splitclamping ring 7, 0 which. is shoull'lcred :is Shown at. 8 so that thebase portion wider than the exposed portion. This ring is split at onepoint in'its iieriphery, that it may be snapped into the annular groove,and. is m'efernhly of such length that when expanded under the heat ofworking its ends will substantially abut and prevent the entrance offluid pres: sure at this ahiltting joint. These ends may also, ofcourse, he scarted or otherwise joined, hut {UK} preferably arranged soto substantially prevent the inlet of fluid.

The face of the piston is providml with a, series of inlet holes 9, ofwhich any desired number may be used, these leading into the 8 face ofthe clamp ng ring opposite to that. face contacting with the packingring 6. inch face is preferably provided with an annular recess lO toallow the fluid entering through the holes to pass around and contact 50with this cntir "face of the clmnpiug ring. We have shown five of theseholes through each face, though any desired number may he used.

In the operation of the device. the fluid pressure in the cylinderenters the holes 9, by acting; upon the recessed face of the clampingring, ill fo ce this clamping ring against the packing 'rinp; G andthereby clamp it against the opposite wall of its con 1% tnining recess.The clamping ring is made it careful nesit fit. so that little. it any,sure will pass underneath the clamping; ring: and. packing ring to forcethe nching; ring only Such a small amount of pressure creep ing in. isso much smaller than the pressure exerted upon. the clamping. ring tochimp the packing ring in place, that the packing ring will he heldagainst excessive forcing out takes place alternately, first on one sideof are located between the outer-packingv the piston and then upon theother at the explosion strokes. As the intermediate packing rings 4 andrings, there is little or no need of arranging these with the clampingrings and supply orts as above described, though they may e so arrangedif desired. In Figs. 5 to 9, inclusive, we show the invention as appliedto the packing gland in the head of a cylinder and surrounding thepiston rod. In this case 11 is' the piston rod,

12 the head of the: cylinder, and 13 the gland which is removably'tap-bolted to the head. This'gland may "contain a series of metallicpacking rings 16' and 16' of any usual or desirable type, and especiallyfor the rings in the groove nearest to the interior of the cylinder weapplyour invention as above disclosed. In this case 14 is the, twopiececlamping ring, which is otherwise similar to the ring of the first form,and 15- are the pressure holes leading to the recessed fac'eof' thisring. These holes allow fluid topass through the head ,of the cylin derand to the face of the ring so as to clamp the packing rings 16 firmlyin place.

We have shown three sets of these rings, one

set containing three, and 'the, other two sets containing two each, inthe gland, these being pressed against the dividing. wall 17 of thegland, by the fluid pressure on the clamping ring. The'packing rings 16in the form shown, each comprise'two shapes, one shown'at 18 in Fig, 8,and the other at 19 in 'Fig. 9. The annulus is made up of thesealternate shapes, and the joints of one annulus are arranged instaggeredrelation to those'of the next and heldby the encircling spring ring 20.In this case, a relatively stationary packing around a relativelymovable cylinder, the action is, of course, the same as in the case ofthe movable piston carrying the rin except that the packing action is acon racting-one around the piston rod. By the word expansible in ourclaims we intend to cover either outward expansion orinward expansion;as for example, in the two forms shown.

The advantages of our invention will be obvious to those skilled in thisart, since excessive outward pressure on the packing rings 1s avoided,and thereby excessive wear and shoulderin of the cylinders or pistonrodsis;lessene or avoided.

The system is simple, may be cheaply made, and is not liable to get outof order. The amount of pressure upon the clamping rings will.be'proportionate to the presstlre exerted by the explosive charge.

The invention may be applied to single or double-acting cylinders, theform and arrangement of. the fluid-pressure-actuated clamping device maybe varied; and other changes may be made without departing from ourinvention.

We claim 1. A packing device-for piston heads having an annular grooveonveach end thereof,

a split packing ring seated in each groove, a sectional clamping ringseated .in each of .said grooves for clamping the rings against thewalls of the grooves, there being ports leading outwardly through thewalls of the piston heads from the grooves, said ports being arranged topermit fluid pressure to act upon the clamping rings to force them in alongitudinal direction to clamp the packing rings against the walls ofthe groovesto prevent expansion of the packing rings byfluid pressure,each of said clamping rings being arranged to be acted upon by the fluidpressure when the piston -is moved in one direction and free from theactionof the fluid pressure during its movement in the other directionand means for preventing radial movement of the clamping ring sections;substantially as described.

'2. A pacln'ng device for fluid pressure cylinders having an annulargroove, a split packing ring seated in said groove, a sectional clampingring seated withln said groove, there being ports from said groove toadmit fluid pressure to the side of the clamping'ring to clamp thepacking ring against the wall of the groove to prevent expansion of thepacking ring by fluid pressure, and means for preventing the expansionof the clamping ring by the fluid pressure; substantially as described;

:3. A packing devicefor piston heads, having an annular groove, a'splitpacking ring seated in said groove, an annular flange have hereunto A ESnon'ron, THOMAS w. KEEN.

Witnesses: l

J. A. HAMILTON, W. H. Comsr'rr.

